ACEA ??'s

Joined
Jun 9, 2004
Messages
488
Location
Theodore Al
To start, I dont want this to be a brand vs brand deal, just curious on using this rating to evaluate oils and weights. Im going to use Mobil because their site is easy and Im looking at it. Say, if you are looking in the 0w-20 to 5w-30 range, can you determine the following facts from the following designations? Mobil 5w-20 A1/B1 - A1/B1 Oil intended for use in gasoline and car + light van diesel engines specifically designed to be capable of using low friction low viscosity oils with a High temperature / High shear rate viscosity of 2.6 to 3.5 mPa.s. These oils may be unsuitable for use in some engines. Consult owner manual or handbook if in doubt. Mobil1 5w-30 A1/B1 A5/B5 - A5/B5 Stable, stay-in-grade oil intended for use at extended drain intervals in high performance gasoline and car + light van diesel engines designed to be capable of using low friction low viscosity oils with a High temperature / High shear rate viscosity of 2.9 to 3.5 mPa.s. These oils may be unsuitable for use in some engines. Consult owner manual or handbook if in doubt. Mobil 1 5w-20 EP A1/B1 Mobil 1 5w-30 EP A5/B5 Should one take away, that for longer runs and better protection, a A5/B5 oil would be a better choice than a A1/B1 (Both 5w-30's)? For detergency, is one better than the other? Reading their standard, and understanding it, is a little tough. Also I gather that A1/B1 are allowed to shear out of grade while A5/B5 isnt? TIA
 
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